Engine-cylinder dresser



Re. muck. ENGINE CYLINDER DRESSER.

APPLICATION FILED FEB- 9. 1922.

PatenNov. 7, 1922 2 SHEETS-SHEET l- R. G. MAUCK. ENGINE CYLINDER DRESSER.

APPLICAHON FILED FEB. 9, I922- Patented Nov. 7, 1922 2 SHEETS -SHEET 2.

Patented Nov. 7, 1922..

STATES ROBERT Gr. MAUCK, 01E PRINCETON, INDIANA ENGINE-CYLINDER DRESSER.

Application filed February 9, 1922. Serial No. 535,174.

To all whom it may concern:

Be it known that 1, ROBERT Gr. MAUCK, a citizen of the United States, and residing at Princeton, in the county of Gibson and State 5 of Indiana, have invented certain new and useful Improvements in Engine-Cylinder Dressers, of which the following is a full, clear, and exact description.

My invention relates to engine cylinder finishers and dressers and has as an ob ect the provision of a device that can be readily inserted in an engine cylinder or similar structure and will effectively finish the interior thereof and true up worn cylmder walls.

Another object is to simplify the construction and render the device easy to construct and operate, and permit ready renewal of the abrasive material employed.

Another object is to provide means for adjusting the curvature of the outer surface of the dresser within certain limits so that it may be used to true up cylinders of difierent sizes more accurately.

Further objects will be apparent from the following detailed description and the appended claims.

In the accompanying drawings Figure 1 is a side elevation of the device in operative position, the engine cylinder being shown in section;

Figure 2 is an end view;

Figure 3 is a cross section taken substantially on the'line 33 of Figure 5, with parts in full lines;

Figure 4 is a side view of one of the sec tions, looking in the direction of the arrows at the ends of the line 4-4 of Figure 2; and

Figure 5 is a longitudinal section on the line 55 of Figure 2, parts being shown in full lines.

A conventional lathe or similar machine A provided with a rotatable chuck or tool holder B, is shown in Figure 1, which also illustrates in section the engine cylinder C being treated.

A shank or rod 1 adaptedto be held in the tool holder B is provided at its opposite end with a cross head 2, and a projection 3 is provided in line with the rod 1. The parts 1, 2, and 3 may be made separately and soldered, brazed or otherwise rigidly secured together, or they may be made in one integral part. On either side of the cross head 2 the rod 1 has two sides cut out or flattened, as at 4. Wrapped around the cross head 2 is a coil spring 5 which is held in position by the rod 1 and projection 3.

The dresser proper consists oftwo sectlons 6, each of which is appreciably less than a half cylinder. identical and a description of one will suffice for both.

Along each edge of the section 6 is a thickened portion 6' which may be made integral with the section or may be a separate strip soldered, brazed or otherwise r:gidly attached to the edge of the section. At each end the portion 6' has an inwardly turned ear 7 to which are attached by screws 8 right-angled brackets or lugs 9. Passing through these lugs 9 and screw-threaded therein are screws 10 which are reversely threaded from the center towards the ends, so that turning the screw members 10 will cause the lugs to approach each other or to be moved farther apart. Attached to the middle of the screws 10 are nuts 11, which are brazed or' otherwise rigidly attached to the screws 10, and furnish means whereby appropriate tools can be used to readily turn the screws. Obviously these nuts 11 might be made integral with the screw members, or other equivalent means for turning the screws 10 might be employed.

The purpose of this structure is to permit the particular curve of the outer cylindrical surface of the sections 6 to be varied, whereby the device may be used for truing up cylinders or analogous structures of varying dimensions. The metal of which the sections 6 is constructed is thin enough to permit this adjustment within the limits desired.

A spider 12 having a central circular opening 13 is attached by its feet 14 to the inner surface of each section at about its middle portion. These feet are preferably brazed or soldered in place. Within the openings 13 fit the ends of the cross head 2, and by this means rotary movement of the shank or rod 1 is transmitted to the sections 6. The parts are preferably so dimensioned that when in place the ends of the spring 5 will rest against the spiders 12. The sections can therefore be pressed toward each other when introduced into the cylinder in the position shown in Figure 1, and the spring 5 will act to press each section 6 against the inner surface of the cylinder C.

Carried by each thickened portion 6 near its middle is a screw 15 which carries a wing These sections are nut 16 which engages a plate 17 tohold it in position. The abrasive material 18, which is preferably emery cloth, is placed around the outside of each section 6, and its edges are folded in and clamped in place between the plates 17 and the strip 6. This holds the abrasive material in place securely, but permits its ready change and also leaves the entire outer surface of each section 6 smooth and unbroken."

,The method of using the device is believed to be sufficiently clear from the above description. The screws 10 permit varying the curvature of each end of each section independently. The rod 1 is shown as being turned by a lathe or similar machine, but the invention is not so limited, as this may be turned by any desired means. The description is not intended to limit the device except as it is defined by the appended claims.

I claim as my invention:

1. An engine cylinder dresser comprising two complementary sections the surface of each being a portion of a cylinder, and independent means at each end of each section for changing the curvature of said surfaces to that of a cylinder of different diameter.

2. An engine cylinder dresser comprising two complementary sections each being a segment of a cylinder, and independent means at each end of each section and located within the same, for varying the curvature of the outer surfaces of said seetions.

3. An engine cylinder dresser comprising two complementary sections each having an outer curved surface, a pair of inwardly projecting lugs at each end of each section, a screw member threaded through each pair of lugs, the parts of said screw which engage the lugs being oppositely threaded,

whereby a turning of the screws will vary the curvature of said outer surface.

4. In a dressing tool, a section having an outer cylindrical surface, and means for varying the surface to that of a cylinder of different diameter.

5. An engine cylinder dresser comprising two complementary sections having an outer working surface, a spider carried by the inside of each section and having a central opening, an operating rod provided with a cross head the ends of which fit within said openings, and a single spring coiled about said cross head and bearing against said spiders when the parts are assembled.

6. An engine cylinder dresser comprising two complementary sections each having an outer Working surface adapted to receive a sheet of abrasive material, the edges of each section being thickened and having inturned ears at their ends, means Within each section for clamping each edge of the sheet against said thickened edges, and means carried by said inturned ears for varying the curvature of each section.

7 An engine cylinder dresser comprising two complementary sections each being a segment of a cylinder, and means for varying the curvature of the outer surfaces of said sections to that of a cylinder of different diameter.

8. An engine cylinder dresser comprising two complementary sections each being the segment of a cylinder, and independent means at each end of each section for varying the curvature of the outer surfaces of said sections to that of a cylinder of different diameter.

In testimony whereof, I have hereunto subscribed my name.

ROBERT G. MAUCK. 

